The maximum potential difference that exists between the terminals of a cell which is disconnected from the external circuit is called electromotive force. When there is no current in the circuit, that

It found a earth like planet Kepler-22b which is 600 light years from the earth.

Doppler Effect When there is a relative motion between the source of waves and the observer, the frequency of wave produced by a source and the frequency received by the observer is different. This effect

When light of appropriate frequency is incident on a metal, then electrons are emitted from that metal. This process of emission of electrons is called photoelectric emission and the effect is called

As a teacher, you have to wear many hats. You will, to name but of a few of the roles teachers assume in carrying out their duties, be a communicator, a disciplinarian, a conveyor of information, an evaluator,

When light passes from more denser medium to less denser medium, if the angle of incidence is more than critical angle all light reflects to the denser medium from the plane of separation according to

Resistance of conductor increases with increase in temperature. When temperature of a resistor increases the particles vibrates with greater amplitude. As a result free electrons collides more frequently

First observed transit by Kepler space telescope in May 12, 2009. It is located about 600 light-years from Earth. Kepler-22b's size is roughly twice that of Earth. Its mass and surface composition are

Year 2100 Mondila is a girl of 18 years. She is the first baby born in artificial ovary. To design her genetic code scientist took 30 years. She is now studying artificial intelligence. Now she is running

This is due to total internal reflection

Resistance of semiconductor decreases with increase in temperature. Lattice vibration increases with increase in temperature that increase the temperature. Charge carrier density increases with increase

For a fixed couple of medium and for light rays of fixed color incident obliquely, the ratio of sine of the angle of incidence to the sine of angle of refraction is a constant. This constant is known as

When light passes from more denser medium to less denser medium for which angle of incidence, angle of refraction will be 90 degrees that angle of incidence is called critical angle.

First wheel used 8000 B.C. in Asia

In the very ancient period of civilization human uses footsteps, foot and hand to measure the distance or length of a body. But those method creates various types of trouble. Suppose two carpenters want

He is a Philosopher born in Miletus, Turkey. Nationality: Greek Invention: The most difficult thing in life to know yourself